Hi,
I don't have what you need, but just this morning a made a pattern to cover my dash/helm area using dish packing foam and masking tape.
Step 1: use the masking tape to outline where you want the outside edge to be and leave 1/4" - 1/2" of the tape "standing" rather than taped down
Step 2: fit the foam under the standing edge (cutting the foam as you go) and push down in the tape as you go
Step 3: as you go, make relief cuts/holes for items (throttles, wheel, etc.) that need to have "pockets"
Step 4: make marks/notes as necessary with a felt tip pen (don't get on anything other than the foam)
Step 5: trim as necessary
Step 6: out down another layer or two of tape.
Step 7: carefully remove the pattern
Not sure if this helps you or not.
If you are local to me, I'd be happy to give you a hand.
I am Gloucester, MA.